Not known Factual Statements About O'fallon Location Table of ContentsThe smart Trick of O'fallon Weather That Nobody is DiscussingO'fallon Fundamentals ExplainedTop Guidelines Of O'fallon WeatherThe Main Principles Of O'fallon Weather O'Fallon is a city in St. Clair Region, Illinois, which was founded in 1854. O'Fallon's namesake originates from Colonel John https://illinoisstateuniversity26790.wikissl.com/1034462/the_ultimate_guide_to_o_fallon_map